Why it works: Pumpkin and spinach match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and 200 recipes mention both. Both carry 2-methoxy-4-vinylphenol, which smells clove, smoky. The science ↓
The recipe
1 - 9x13 inch panIngredients
Contains: milk, wheat (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Method written by CompKitchen from the ingredient list. Not the original author's method, not kitchen-tested.
Heat oven to 375°F (190°C). Grease a 9x13 inch pan with the softened butter. Toss pumpkin pieces with cinnamon, salt and pepper, spread on a sheet pan and roast 20-25 minutes until tender. Mash coarsely.
Bring a large pot of boiling water to a boil. Cook lasagna noodles until just tender, about 8-10 minutes. Drain and lay flat on a lightly oiled tray.
Heat 1 tablespoon olive oil in a skillet over medium heat. Cook sliced onion and fennel 8-10 minutes until soft, add garlic and cook 1 minute more.
Add ground beef and cook, breaking it up, until no pink remains and it reaches 160°F (71°C). Stir in tomato paste for 1 minute, then add tomato puree and bay leaves. Simmer 15 minutes, then remove bay leaves and season with salt and pepper.
Wilt baby spinach in a large pan with a splash of water over medium heat, about 2-3 minutes. Drain, squeeze dry and chop. Mix with ricotta, nutmeg, and half the Parmesan. Season lightly.
Make the sauce: melt 2 tablespoons butter in a saucepan over medium heat. Whisk in flour for 1 minute, then slowly whisk in milk. Simmer, stirring, until thickened, about 5 minutes. Season with salt and pepper.
Spread a thin layer of meat sauce in the pan. Layer noodles, ricotta-spinach mixture, mashed pumpkin and meat sauce. Repeat, finishing with noodles. Spread the white sauce over the top.
Cover with foil and bake 25 minutes. Uncover, sprinkle with remaining Parmesan and bake 10-15 minutes more until bubbling and lightly browned. Rest 10 minutes before cutting.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much aroma chemistry they share, and how many recipes mention both.
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Pumpkin + spinachtop 6% of all pairsAroma overlapstrongMentioned together200 recipes
Shared aroma: 2-methoxy-4-vinylphenol (clove, smoky).
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Butter + milktop 3% of all pairsAroma overlapstrongMentioned together81,222 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Pumpkin + cinnamontop 3% of all pairsAroma overlaplowMentioned together1,744 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
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Pepper + spinachtop 4% of all pairsAroma overlapmoderateMentioned together3,400 recipes
Shared aroma: nonanal (fat, citrus).
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Olive + spinachtop 4% of all pairsAroma overlapstrongMentioned together2,700 recipes
Shared aroma: 2-undecenal (sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (pumpkin, butter, cinnamon, pepper, flour, milk, olive):
- Capsicumbetter flavor fit
- Potatobetter flavor fit
- Tomatobetter flavor fit
- Onionthe original
Fit is the average pairing score against pumpkin, butter, cinnamon, pepper, flour, milk, olive. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
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